public void BasicTest(string input, string[] output)
{
var customBreaker = new CustomBreaker();
customBreaker.BreakWords(input, false);
var outputList = new List <int> {
0
};
customBreaker.LoadBreakAtList(outputList);
for (int i = 0; i < outputList.Count - 1; i++)
{
Assert.AreEqual
(
output[i],
input.Substring(outputList[i], outputList[i + 1] - outputList[i])
);
}
}
public void DoBreak(char[] inputBuffer, int startIndex, int len, List <int> breakAtList)
{
myTextBreaker.BreakWords(inputBuffer, startIndex, len);
myTextBreaker.LoadBreakAtList(breakAtList);
}
/* //Paste this into the C# Interactive, fill <username> yourself
#r "C:/Users/<username>/source/repos/CSharpMath/Typography/Build/NetStandard/Typography.TextBreak/bin/Debug/netstandard1.3/Typography.TextBreak.dll"
using Typography.TextBreak;
(int, WordKind, char)[] BreakText(string text) {
var breaker = new CustomBreaker();
var breakList = new List<BreakAtInfo>();
breaker.BreakWords(text);
breaker.LoadBreakAtList(breakList);
//index is after the boundary -> last one will be out of range
return breakList.Select(i => (i.breakAt, i.wordKind, text.ElementAtOrDefault(i.breakAt))).ToArray();
}
BreakText(@"Here are some text $1 + 12 \frac23 \sqrt4$ $$Display$$ text")
*/
/* //Version 2
#r "C:/Users/<username>/source/repos/CSharpMath/Typography/Build/NetStandard/Typography.TextBreak/bin/Debug/netstandard1.3/Typography.TextBreak.dll"
using Typography.TextBreak;
string BreakText(string text, string seperator = "|")
{
var breaker = new CustomBreaker();
var breakList = new List<BreakAtInfo>();
breaker.BreakWords(text);
breaker.LoadBreakAtList(breakList);
//reverse to ensure earlier inserts do not affect later ones
foreach (var @break in breakList.Select(i => i.breakAt).Reverse())
text = text.Insert(@break, seperator);
return text;
}
BreakText(@"Here are some text $1 + 12 \frac23 \sqrt4$ $$Display$$ text")
*/
public static Result<TextAtom> Build(string text, bool enhancedColors) {
if (string.IsNullOrEmpty(text)) return new TextAtom.List(Array.Empty<TextAtom>(), 0);
bool? displayMath = null;
StringBuilder mathLaTeX = null;
bool backslashEscape = false;
bool afterCommand = false; //ignore spaces after command
int dollarCount = 0;
var atoms = new TextAtomListBuilder();
var breaker = new CustomBreaker();
var breakList = new List<BreakAtInfo>();
breaker.BreakWords(text, false);
breaker.LoadBreakAtList(breakList);
Result CheckDollarCount() {
switch (dollarCount) {
case 0:
break;
case 1:
dollarCount = 0;
switch (displayMath) {
case true:
return "Cannot close display math mode with $";
case false:
if (atoms.Add(mathLaTeX.ToString(), false).Error is string mathError)
return "[Math mode error] " + mathError;
mathLaTeX = null;
displayMath = null;
break;
case null:
mathLaTeX = new StringBuilder();
displayMath = false;
break;
}
break;
case 2:
dollarCount = 0;
switch (displayMath) {
case true:
if (atoms.Add(mathLaTeX.ToString(), true).Error is string mathError)
return "[Math mode error] " + mathError;
mathLaTeX = null;
displayMath = null;
break;
case false:
return "Cannot close inline math mode with $$";
case null:
mathLaTeX = new StringBuilder();
displayMath = true;
break;
}
break;
default:
return "Invalid number of $: " + dollarCount;
}
return Ok();
}
(int startAt, int endAt, char endingChar, WordKind wordKind) ObtainRange(int i) =>
(i == 0 ? 0 : breakList[i - 1].breakAt, breakList[i].breakAt, text[breakList[i].breakAt - 1], breakList[i].wordKind);
for (var i = 0; i < breakList.Count; i++) {
var (startAt, endAt, endingChar, wordKind) = ObtainRange(i);
bool SetNextRange() {
bool success = ++i < breakList.Count;
if(success) (startAt, endAt, endingChar, wordKind) = ObtainRange(i);
return success;
}
Result<string> ReadArgument() {
afterCommand = false;
if (!SetNextRange()) return Err("Missing argument");
if (endingChar != '{') {
var toReturn = text[startAt].ToString();
#warning Not one char only, should skip spaces then read next char, and it is a possible command
//range contains one char only
if (startAt == endAt)
_ = SetNextRange(); //reaching the end does not affect validity of argument
else
startAt += 1;
return Ok(toReturn);
}
int endingIndex = -1;
//startAt + 1 to not start at the { we started at
for (int j = startAt + 1, bracketDepth = 0; j < text.Length; j++) {
if (text[j] == '{') bracketDepth++;
else if (text[j] == '}')
if (bracketDepth > 0) bracketDepth--;
else { endingIndex = j; break; }
}
if (endingIndex == -1) return Err("Missing }");
var resultText = text.Substring(endAt, endingIndex - endAt);
while (startAt < endingIndex)
_ = SetNextRange(); //this never fails because the above check
return Ok(resultText);
}
atoms.TextLength = startAt;
if (endingChar == '$') {
if (backslashEscape)
if (displayMath != null) mathLaTeX.Append(@"\$");
else atoms.Add("$");
else {
dollarCount++;
continue;
}
backslashEscape = false;
} else {
{ if (CheckDollarCount().Error is string error) return error; }
//Normal unescaped text section, could be in display/inline math mode
if (!backslashEscape) {
var textSection = text.Substring(startAt, endAt - startAt);
switch (endingChar) {
case '$':
throw new InvalidCodePathException("The $ case should have been accounted for.");
case '\\':
backslashEscape = true;
continue;
case var sp when wordKind == WordKind.Whitespace || wordKind == WordKind.NewLine:
//Collpase spaces
//Consume newlines after commands
if (displayMath == null)
if (afterCommand) continue;
else atoms.Add();
else mathLaTeX.Append(textSection);
break;
case var punc when displayMath == null && wordKind == WordKind.Punc && atoms.Last is TextAtom.Text t:
//Append punctuation to text
t.Append(textSection);
break;
default: //Just ordinary text
if (displayMath == null) atoms.Add(textSection);
else mathLaTeX.Append(textSection);
break;
}
afterCommand = false;
continue;
}
//Escaped text section but in inline/display math mode
if (displayMath != null) {
switch (endingChar) {
case '$':
throw new InvalidCodePathException("The $ case should have been accounted for.");
case '(':
switch (displayMath) {
case true:
return "Cannot open inline math mode in display math mode";
case false:
return "Cannot open inline math mode in inline math mode";
default:
throw new InvalidCodePathException("displayMath is null. This switch should not be hit.");
}
case ')':
switch (displayMath) {
case true:
return "Cannot close inline math mode in display math mode";
case false:
if (atoms.Add(mathLaTeX.ToString(), false).Error is string mathError)
return "[Math mode error] " + mathError;
mathLaTeX = null;
displayMath = null;
break;
default:
throw new InvalidCodePathException("displayMath is null. This switch should not be hit.");
}
break;
case '[':
switch (displayMath) {
case true:
return "Cannot open display math mode in display math mode";
case false:
return "Cannot open display math mode in inline math mode";
default:
throw new InvalidCodePathException("displayMath is null. This switch should not be hit.");
}
case ']':
switch (displayMath) {
case true:
if (atoms.Add(mathLaTeX.ToString(), true).Error is string mathError)
return "[Math mode error] " + mathError;
mathLaTeX = null;
displayMath = null;
break;
case false:
return "Cannot close display math mode in inline math mode";
default:
throw new InvalidCodePathException("displayMath is null. This switch should not be hit.");
}
break;
default:
mathLaTeX.Append($@"\{text.Substring(startAt, endAt - startAt)}");
break;
}
backslashEscape = false;
continue;
}
//Escaped text section and not in inline/display math mode
afterCommand = true;
switch (text.Substring(startAt, endAt - startAt)) {
case "(":
mathLaTeX = new StringBuilder();
displayMath = false;
break;
case ")":
return "Cannot close inline math mode outside of math mode";
case "[":
mathLaTeX = new StringBuilder();
displayMath = true;
break;
case "]":
return "Cannot close display math mode outside of math mode";
case @"\":
atoms.Break(1);
break;
case ",":
atoms.Add(Space.ShortSpace, 1);
break;
case var _ when wordKind == WordKind.Whitespace: //control space
atoms.Add();
break;
case "backslash":
atoms.Add(@"\");
break;
case "par":
atoms.Break(3);
#warning Should the newline and space occupy the same range?
atoms.TextLength -= 3;
atoms.Add(Space.ParagraphIndent, 3);
break;
case "fontsize": {
if (ReadArgument().Bind(fontSize =>
float.TryParse(fontSize, System.Globalization.NumberStyles.AllowDecimalPoint |
System.Globalization.NumberStyles.AllowLeadingWhite |
System.Globalization.NumberStyles.AllowTrailingWhite,
System.Globalization.CultureInfo.InvariantCulture,
out var parsedResult) ?
Ok(parsedResult) :
Err("Invalid font size")
).Bind(
ReadArgument().Bind(resizedContent => Build(resizedContent, enhancedColors)),
(fontSize, resizedContent) =>
atoms.Add(resizedContent, fontSize, "fontsize".Length)
).Error is string error
) return error;
break;
}
case "color": {
if (ReadArgument().Bind(color =>
Color.Create(color, enhancedColors) is Color value ?
Ok(value) :
Err("Invalid color")
).Bind(
ReadArgument().Bind(coloredContent => Build(coloredContent, enhancedColors)),
(color, coloredContent) =>
atoms.Add(coloredContent, color, "color".Length)
).Error is string error
) return error;
break;
}
//case "red", "yellow", ...
case var shortColor when enhancedColors && Color.PredefinedColors.Contains(shortColor): {
if (Ok(Color.Create(shortColor, enhancedColors) ??
throw new InvalidCodePathException(
"This case's condition should have checked the validity of shortColor.")
).Bind(
ReadArgument().Bind(coloredContent => Build(coloredContent, enhancedColors)),
(color, coloredContent) =>
atoms.Add(coloredContent, color, shortColor.Length)
).Error is string error
) return error;
break;
}
//case "textbf", "textit", ...
case var command when !command.Contains("math") && FontStyleExtensions.FontStyles.TryGetByFirst(command.Replace("text", "math"), out var fontStyle): {
if (ReadArgument()
.Bind(content => Build(content, enhancedColors))
.Bind(builtContent => atoms.Add(builtContent, fontStyle, command.Length))
.Error is string error)
return error;
break;
}
case var command:
if (displayMath != null) mathLaTeX.Append(command); //don't eat the command when parsing math
else return @"Unknown command \" + command;
break;
}
backslashEscape = false;
}
}
{ if (CheckDollarCount().Error is string error) return error; }
if (backslashEscape) return @"Unknown command \";
if (displayMath != null) return "Math mode was not terminated";
return atoms.Build();
}
